Suddenly my heat gauge is registering hot, then normal, then cycle repeats.

Asked by Nov 05, 2014 at 01:45 PM about the 2002 Acura TL 3.2 FWD

Question type: Maintenance & Repair

Normally my heat gauge reads a little less than halfway up and just stays there, but the
needle is now moving up and down the gauge, and sometimes my cooling fan is on when
I shut the motor down (this is so rare for my care that I have never had it happen before)  
Could it be coolant or bad thermostat that is causing this?

2 Answers

12,335

First check your coolant overflow tank and make sure your cooling system is topped off to the fill line with a 50/50 mix.

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